<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="item in shopCartList" :key="item.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked="item.isChecked" @click="updataCommodityChecked($event,item.skuId)">
          </li>
          <li class="cart-list-con2">
            <img :src="item.imgUrl">
            <div class="item-msg">{{item.skuName}}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{Math.max(item.skuPrice,1)}}</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="updataCommodityNum('minus',item)">-</a>
            <input autocomplete="off" type="text" :value="item.skuNum" minnum="1" class="itxt" @change="updataCommodityNum('change',item,$event)">
            <a href="javascript:void(0)" class="plus" @click="updataCommodityNum('add',item)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{Math.max(item.skuNum * item.skuPrice,1)}}</span>
          </li>
          <li class="cart-list-con7">
            <a href="javascript:;" class="sindelet"  @click="deleteShopCar(item.skuId)">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
         <input class="chooseAll" type="checkbox" v-model="isCheckedAll">
        <span>全选</span>
      </div>
      <div class="option">
        <a href="javascript:;"  @click="deleteShopCarAll">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{checkedNum}}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{checkedPrice}}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" href="###" target="_blank">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {mapState} from "vuex"
  export default {
    name: 'ShopCart',
          mounted(){
          this.$store.dispatch("getShopCartList");
      },
    computed:{
      ...mapState({
        shopCartList:state=>state.addcartsuccess.shopCartList
      }),
      //统计选择的商品件数
      checkedNum(){
        return this.shopCartList.reduce((prve,item)=>{
               if(item.isChecked){
                  prve += item.skuNum
               }
               return prve
        },0)
      },
      //统计选择的商品总价
      checkedPrice(){
        return this.shopCartList.reduce((prve,item)=>{
              if(item.isChecked){
                prve += item.skuNum*item.skuPrice
              }
              return prve
        },0)
      },
      // 全选全不选
      isCheckedAll:{
        get(){
          return this.shopCartList.every(item=>item.isChecked === 1) && this.shopCartList.length > 0
        },
        async set(val){
          try {
              await this.$store.dispatch("getShopCarStateAll",val ? 1:0)
                    this.$store.dispatch("getShopCartList");
                    
          } catch (error) {
              alert("网络连接失败")
          }
            
        },
      },
    },
    methods:{
      //修改购物车数量的函数
      async updataCommodityNum(data,item,ev){
          if(data === 'minus'){
            if(item.skuNum > 1){
                try {
                  await this.$store.dispatch("getAddCartSuccess",{'skuId':item.skuId,'skuNum':-1});
                        this.$store.dispatch("getShopCartList");
                } catch (error) {
                  alert("网络请求失败");
                }
                 
            }else{
              return
            }
          }else if(data === 'add'){
              try {
                 await this.$store.dispatch("getAddCartSuccess",{'skuId':item.skuId,'skuNum':1});
                       this.$store.dispatch("getShopCartList");
              } catch (error) {
                 alert("网络请求失败");
              }
          }else if(data === 'change'){
              let updataskuNum =  (Number(ev.target.value))
              if(isNaN(updataskuNum) || updataskuNum  < 1){
                 ev.target.value = item.skuNum;
                return
              }else{
                   await this.$store.dispatch("getAddCartSuccess",{'skuId':item.skuId,'skuNum':updataskuNum - item.skuNum});
                         this.$store.dispatch("getShopCartList");
              }
          }
      },
      //单个修改购物车商品选中状态的函数
      //多个修改Promise.all，采用单个修改的接口去修改多个，但是真正的不是这样做(应该有一个修改多个的是接口)
      //Promsise.all() 是promise的一个api
      //功能：  批量处理promise对象(并发)
      //参数：  promise对象的数组对象
      //返回值  返回一个新的promise对象
      async updataCommodityChecked(ev,skuID){
        let isChecked =Number(ev.target.checked)
        try {
          await this.$store.dispatch("getShopCarState",{skuID,isChecked});
                this.$store.dispatch("getShopCartList");
        } catch (error) {
          alert("网络请求失败")
        }
      },
      //删除单个购物车的函数
      async deleteShopCar(skuId){
            try {
              let st =  await this.$store.dispatch("deleteShopCar",skuId);
                  if(st === 'ok'){
                    this.$store.dispatch("getShopCartList");
                  }
          } catch (error) {
              alert("网络连接错误,删除购物车失败")
          }
        
      },
      //删除多个购物车的函数
      async deleteShopCarAll(){
          try {
            await this.$store.dispatch("getDeleteShopCarAll")
                  this.$store.dispatch("getShopCartList");
          } catch (error) {
              alert("删除勾选的购物车失败:网络链接超时")
          }
      },

    },
  }
</script>

<style lang="less" scoped>
  .cart {
    width: 1200px;
    margin: 0 auto;

    h4 {
      margin: 9px 0;
      font-size: 14px;
      line-height: 21px;
    }

    .cart-main {
      .cart-th {
        background: #f5f5f5;
        border: 1px solid #ddd;
        padding: 10px;
        overflow: hidden;

        &>div {
          float: left;
        }

        .cart-th1 {
          width: 25%;

          input {
            vertical-align: middle;
          }

          span {
            vertical-align: middle;
          }
        }

        .cart-th2 {
          width: 25%;
        }

        .cart-th3,
        .cart-th4,
        .cart-th5,
        .cart-th6 {
          width: 12.5%;

        }
      }

      .cart-body {
        margin: 15px 0;
        border: 1px solid #ddd;

        .cart-list {
          padding: 10px;
          border-bottom: 1px solid #ddd;
          overflow: hidden;

          &>li {
            float: left;
          }

          .cart-list-con1 {
            width: 15%;
          }

          .cart-list-con2 {
            width: 35%;

            img {
              width: 82px;
              height: 82px;
              float: left;
            }

            .item-msg {
              float: left;
              width: 150px;
              margin: 0 10px;
              line-height: 18px;
            }
          }


          .cart-list-con4 {
            width: 10%;

          }

          .cart-list-con5 {
            width: 17%;

            .mins {
              border: 1px solid #ddd;
              border-right: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }

            input {
              border: 1px solid #ddd;
              width: 40px;
              height: 33px;
              float: left;
              text-align: center;
              font-size: 14px;
            }

            .plus {
              border: 1px solid #ddd;
              border-left: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }
          }

          .cart-list-con6 {
            width: 10%;

            .sum {
              font-size: 16px;
            }
          }

          .cart-list-con7 {
            width: 13%;

            a {
              color: #666;
            }
          }
        }
      }
    }

    .cart-tool {
      overflow: hidden;
      border: 1px solid #ddd;

      .select-all {
        padding: 10px;
        overflow: hidden;
        float: left;

        span {
          vertical-align: middle;
        }

        input {
          vertical-align: middle;
        }
      }

      .option {
        padding: 10px;
        overflow: hidden;
        float: left;

        a {
          float: left;
          padding: 0 10px;
          color: #666;
        }
      }

      .money-box {
        float: right;

        .chosed {
          line-height: 26px;
          float: left;
          padding: 0 10px;
        }

        .sumprice {
          width: 200px;
          line-height: 22px;
          float: left;
          padding: 0 10px;

          .summoney {
            color: #c81623;
            font-size: 16px;
          }
        }

        .sumbtn {
          float: right;

          a {
            display: block;
            position: relative;
            width: 96px;
            height: 52px;
            line-height: 52px;
            color: #fff;
            text-align: center;
            font-size: 18px;
            font-family: "Microsoft YaHei";
            background: #e1251b;
            overflow: hidden;
          }
        }
      }
    }
  }
</style>